[MacPorts] #54289: libcxx{,-abi} : upgrade + "runtime" variant

[MacPorts]

#54289: libcxx{,-abi} : upgrade + "runtime" variant
-------------------------------+----------------------
  Reporter:  RJVB              |      Owner:  jeremyhu
      Type:  update            |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:  haspatch
      Port:  libcxxabi libcxx  |
-------------------------------+----------------------

Comment (by RJVB):

 It may be but when I include the file I'm getting a link error. If you
 look at the CMake files you'll see that the file isn't meant to be used on
 Mac at all.

--
Ticket URL: <https://trac.macports.org/ticket/54289#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS